Reversing mechanism for lathes



July 17, 1923. f mslm/6 H. J. KAIM REVERSING MECHANISM FOR -LATHES y Filed oct. 1e. i920 PiZZ .l pin 19 thereof axially in a plane at ri ht i said lever will swing angles to the axis of the .s indie B, -so t at in t e plane of said axis. Thepivot pin 19 constitutes a fulcrum lfor the lever, the `short arm of said lever being formed with a eain end 20 above its fulcrum A19, and along army portion 21, on the opposite side of the fulcrum. Rotatableon 'the bearin .por-

tion 15 of the` housing is the groove shift ring 22, hav' an annular groove 23,

vwherein 'slidin y. fit two opplositely disposed segmenta shoes 24, each s oe having a radially disposed bore wherein is journaled alpin 25, sald pins being radially oppositely disposed Ywith respect to the spindle B. The ring 22 is of a. s1ze and suitably rounded so as to engage the curved cam faces 26 of the respective levers 18 `to move the tail portions21 upwardly. The cam end 20 of the lever engages with the inner face 27 of the clutch member E, so that when the ring 22 is slid longitudinally on the bearing 15 lin one direction, -the tail 21 of the lever will be' raised thereby forcing the clutch member E against the seat 8 of the pulley. Extending at. right angles from the face 27 of the clutch member are the pins 28,

v ring 22 is slid in opposite direction responsive to the movement ofthe lever 37 in that direction, the-opposite pulley will be likewise engaged and will cause the spindle to be revolved in the opposite direction.

v The pins are threadedly mounted in the respective opposite arms 31 of the yoke G. Preferably inset in the base 3 2 of the head stock is the support H,comprising vlongitudinally spaced journal hubs 33 rotat-A ably supporting the shaft .34, said shaft Lbeing disposed below and at right angles to the spindle B. Closely fitting the space between the journal hubs and secured by means of the key 35 to the shaft 34,- is the shank 36 of the yoke G. An upstanding lever 37 secured by means of the set screw 38 on the end of the shaft 34, serves as a means whereby the yoke G may beV rocked, whereby the ring 22 will be slid back and forth to operate either pulley as desired. As the vconic faces of the clutch members become worn with use, the pulley may be moved longitudinally on the bushing by means of the adjustment rings By l mountlng the movable clutch lmember ont e=pu1ley hub .and insertin the springs in the manner shown, I yam @naed Vto apply the invention between the journal boxes of many standard makes of lathe originally designed with the well known cone pulleys.

As shown in the drawings the housing is split at alA which enables me to insert the grooved shift ring 22.

It willbe noted that the device may be removed as a unit from the spindle by simply removing-the screws 14 and backing out thepins 25,so that the device may be shipped in assembled state it only being necessary to tap thespindle of a standard lathe for the screws 14. v

I claim:

1. The combination with the headstock of a lathe and the spindle journaled at its ends therein, two spaced pulleys each.formed with ahub revolvably supported'on the spindle between its journals the adjacent sides of said pulleys being formed with clutch seats, horizontally- .and longitudinally disposed lfulcrumed levers for each pulley supported on the spindle and moving bodily therewith,

the. short lever arms thereof directed toward their respective pulleys, hand operable means including a shift ring on the spindle adapted, when it is shifted in opposite directions, to

engage with the respective fulcrumedlevers for said pulleys to move said short lever member housed in each pulley and revoluble on )the hub thereof and spring means interposed between each clutch member and its pulley. for holding the former under stress against its respective fulcrumed levers.

2. The combination with the headstock of a lathe and the spindle journaled at its ends therein, a bushing surrounding the spindle and secured thereto, mechanism including an oscillatory operating lever, and positioned midway of the length of said bushing, a part ofsaid mechanism rotating with the bushing, said rotating part including oppositely disposed levers, pulleys having clutch seats, one ,pulley adjacent each endfof said mechanism revolubly mounted on said bushing, a clutch member for each pulley revolving with' said rotating part of-said mechanism and slidable toward its pulley to engage with the clutch seat thereof when slid, a ring interposed between each clutch member and its pulley, means carried on the ring for normallyl yieldinglyv holding said clutch member away from its clutch seat and against its respective levers, and an adjustment member for each pulley threaded on the end of said bushing and engaging with the pulley for the purpose set forth.

3. A reversing mechanism for lathes comprising a spindle rotatably mounted, av pair of pulleys journaled on the spindle and having` opposed dished faces, a clutch member journaled on the hub ofA eachv pulley andarms toward their respective pulleys, a clutch los adapted to be slid thereonA to -nest 1n the dished portion of its pulle a. spool-like members tothe housi ,.and s, shift ring housing yseeured on the spin le between the lslidable on the housingnfr selectively engegn clutch members, a. lurality o f clamping ing the respective clamping levers-to render 10 levers pivoted on t eend anges of. the them operative. p housing for cumming against the clutch -In testimony whereofI aix my signature.

. -members tomove them to operative position, v

means for loosely connecting the clutch HENRY J. 

